LOWEST TEMPERATURE AT WHICH A SUBSTANCE GIVES OFF SUFFICIENT VAPOR TO FORM AN IGNITABLE MIXTURE.

WHAT IS FIRE POINT?

TEMPERATURE SLIGTLY ABOVE FLASH POINT THAT ALLOWS FOR SUSTAINED COMBUSTION.

WHAT IS IGNITION POINT?

MINIMUM TEMPERATURE AT WHICH SELF-SUSTAINING COMBUSTION OCCURS WITHOUT AN EXTERNAL IGNITION SOURCE.

WHAT IS THE FIRE TRIANGLE?

FUEL

OXYGEN

HEAT

WHAT IS THE FRIE TETRAHEDRON COMPONENTS?

FUEL

OXYGEN

HEAT

UNINHIBITED CHAIN REACTION OF COMBUSTION.

GROWTH STAGE?

AVERAGE SPACE TEMP IS LOW AND THE FIRE IS LOCALIZED IN THE VICINITY OF ITS ORIGIN. SMOKE FROM FIRE FORMS A HOT UPPER LAYER IN THE SPACE.

WHAT IS ROLLOVER?

TAKES PLACE IN THE GROWTH STAGE WHEN UNBURNED COMBUSTIBLE GASES FROM THE FIRE MIX WITH FRESH AIR IN THE OVERHEAD AND BURN AT SOME DISTANCE FROM THE SEAT OF THE FIRE. (ONLY GASES ARE BURNING AND NOT ALL THE CONTENTS OF THE SPACE.)

WHAT IS FLASHOVER?

OCCURS WHEN THE UPPER SMOKE LAYER TEMP REACHES 11000F. SUDDEN SPREAD OF FLAME TO ALL REMAINING COMBUSTIBLES IN THE FIRE SPACES.

WHAT IS THE DECAY STAGE?

THE FIRE CONSUMES ALL AVAILABLE FUEL AND / OR OXYGEN AT WHICH TIME COMBUSTION SLOWS DOWN AND FIRE GOES OUT. (SUITABLE CONDITIONIS FOR BACKDRAFT EXPLOSTION)

WHAT IS CONDUCTION?

TRANSFER OF HEAT THROUGH A BODY OR FROM ONE BODY TO ANOTHER BY DIRECT PHYSICAL CONTACT.

WHAT IS RADIATION?

TRANSFER OF HEAT FROM A SOURCE ACCROSS AN INTERVENING SPACE. NO MATERIAL SUBSTNANCE IS INVOLVED. HEAT TRAVELS OUTWARD FROM THE FIRE IN THE SAME MANNER AS LIGHT; IN STRAIGHT LINES.

WHAT IS CONVECTION?

TRANSFER OF HEAT THROUGH THE MOTION OF CIRCULATING GASES OR LIQUIDS. HEAT IS TRANSFERRED BY CONVECTION THOUGH THE MOTION OF SMOKE, HOT AIR AND HEATED GASES PRODUCED BY A FIRE.

FIRE EXTINGUISHING METHODS?

COOLING- REMOVE / LOWER HEAT

SMOTHERING- REMOVE / DISPLACE OXYGEN

INTERRUPT COMBUSTION- BREAK FIRE TETRAHEDRON

STARVING- REMOVE FUEL

SMOTHERING AGENT?

AQUEOUS FIL FORMING FOAM (AFFF)

PROVIDES LAYER OF FOAM WHICH PREVETS ESCAPE OF FUEL VAPORS AND EXCLUDES OXYGEN FROM FUEL SOURCE, SOME COOLING EFFECT.